ENGINE4-1

舵机初学基础知识,一直苦于难以入门，恰好昨天看到一份舵机资料，感觉不错(Servo beginner basics, has been struggling hard to get started, just yesterday to see a servo information, feel good)

主要用于测试SIM300CZ拨打电话和MT8870程序,已测(Mainly used for testing SIM300CZ call and MT8870 procedures have been measured)

STM32F103RCT6芯片的最小系统板，原理图，PCB。(Minimum system board, schematic diagram, PCB of STM32F103RCT6 chip.)

说明：  st公式的开源高频注入部分代码(hifreqinj_fpu_ctrl)

STM32实现的USB-HID下位机，PC无需驱动能收发数据，文件包括一个PortHelper调试助手(STM32 USB-HID to achieve lower computer, PC without driver can send and receive data, files include a PortHelper debugging assistant)

CC2591功放PCB CC2530+PA (CC2591 power amplifier PCB CC2530+ PA)

说明：  单片机程序调试黑宝书，很好的书籍，适合入门。(Single-chip computer program debugging black book, a good book.)

说明：  系统由单片机、显示器等部分组成，利用显示器来显示密码锁输入的相关信息，系统上电时内部默认三组数字密码（4位或4位以上）；密码输入正确则打开密码锁(The system is made up of single-chip microcomputer, display and other parts. It displays relevant information of the password lock using the display. When the system is powered up, it acquiers three sets of digital Ciphers (4 bits or more than 4 bits). If the password is entered correctly, it will open the password lock.)

it`s a examples about Keil

待检测pcb板和标准pcb对比，然后对待测pcb腐蚀及膨胀处理，进行缺陷标注显示图像并输出焊盘缺失数，导线缺失数，短路数等。所以源图像均有，并再次测试无误，可以直接运行。(To be detected and the standard pcb board pcb contrast, then treat corrosion test pcb and the expansion process, defect labeling displays images and outputs missing number pad, missing a few wires, short circuit and number. So were the source image, and test again correctly, you can run directly.)